Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a170a0b9e1676ad182286e40967dfa7067f54e93d113fe33b29855de6ece560b' 
  AND token = 'vKfC2M9+OGN7MLIY/SVt2JFMd9mv5/0dvduJLouGnXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}